do-release-upgrade --sandbox fails ("submount of systemdir")

[Scott Moser]

Binary package hint: update-manager

after bug 562394 was reported fix, I decided to test it.

I ran:
$ sudo do-release-upgrade -d --sandbox

It promted me with:
Continue running under SSH?

I said "No". Then, started a screen session, and ran again.

The second run dies with:
Sandbox setup failed

It was not possible to create the sandbox environment.

Preparing the upgrade failed

Preparing the system for the upgrade failed. Please report this as a
bug against the 'update-manager' package and include the files in
/var/log/dist-upgrade/ in the bug report.

----
/var/log/dist-upgrade/main.log has:
   2010-04-15 17:34:00,915 WARNING mountpoint /var/cache/apt/archives submount of systemdir

If I do 'sudo umount /var/cache/apt/archives', it will continue past this state.

Note, after the cancel there are still several aufs mounts and such left around, but they dont seem to prevent re-running as the /var/cache/apt/archives mount did.

ProblemType: Bug
Architecture: i386
Date: Thu Apr 15 17:20:59 2010
DistroRelease: Ubuntu 9.10
Ec2AMI: ami-bb709dd2
Ec2AMIManifest: ubuntu-images-us/ubuntu-karmic-9.10-i386-server-20100121.manifest.xml
Ec2AvailabilityZone: us-east-1b
Ec2InstanceType: m1.small
Ec2Kernel: aki-5f15f636
Ec2Ramdisk: ari-d5709dbc
Package: update-manager-core 1:0.126.9
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: User Name 2.6.31-302.7-ec2
SourcePackage: update-manager
Tags: ec2-images
Uname: Linux 2.6.31-302-ec2 i686

[Rolf Leggewie (r0lf)]

I ran into the same issue today, having bind-mounted /var/cache/apt/archives to a temporary storage for the upgrade. During day-to-day-operation my /var partition is limited to 2G. Why is bind-mounting an issue here?